body{margin:0;background:#0a0a0a;color:white;font-family:Arial,sans-serif;}header{text-align:center;padding:60px 20px;}header h1{margin:0;font-size:3rem;}nav{display:flex;justify-content:center;gap:30px;padding:20px;background:#111;}nav a{color:white;text-decoration:none;}.hero{text-align:center;padding:80px 20px;}button{background:#39FF14;border:none;padding:12px 25px;font-weight:bold;cursor:pointer;}section{max-width:900px;margin:auto;padding:60px 20px;}.card{background:#151515;padding:20px;margin-bottom:20px;border-radius:8px;}footer{text-align:center;padding:30px;background:#111;}